/*
 * TLS implementation for Contiki OS
 * Copyright (c) 2012, Vladislav Perelman <vladislav.perelman@gmail.com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the Institute nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */
#ifndef __UTIL_H__
#define __UTIL_H__

#include <contiki.h>

uint8_t process_client_messages(char* buffer, uint16_t msg_length, uint8_t offset, char expected_message);
uint8_t process_server_messages(char* buffer, uint16_t msg_length, uint8_t offset, char expected_message);
int PRF(char* output, char* secret, int secret_length, char* label, char* seed, int seed_length, int size);
void create_server_hello(char* buffer);
void create_client_hello(char* buffer);
void create_client_key_exchange(char* buffer, char* psk_identity, uint16_t psk_identity_length);
void create_change_cipher_spec(char* buffer, uint16_t offset);
void create_finished(char* buffer, uint16_t offset, unsigned long long nonce_expl, char* finished);
void create_application_data(char* buffer, unsigned long long nonce_expl, char* data, uint16_t length);
void create_alert(char* buffer, uint8_t level, uint8_t type);


#endif
